Sorry, but there is no such thing as renew. You can not wipe out the dates and use a pen to add new dates.
Each and every year you apply for a NEW Extension of Stay and you must each and every year meet all the requirements. And each and every year Immigration will put a NEW stamp in the passport.
With the Non Immigrant B visa you get 90 days of stay when you enter Thailand, you can fill in 90 days or longer as it is normal that a company will support you to apply for an Extension of Stay based on employment.
I guess it it clear, If you apply for a visa you meet the requirements. Even when this is an on -line application.
Thanks for all the contributions, but there is a huge difference between application on-line even before you jump into an airplane and after a long flight walk to the Immigration desk on the airport in Thailand.